1. A regression analysis is used to determine the

1. degree of bias within a variable
2. degree of freedom in the data
3. amount of variation within a variable
4. degree of association between variables

2. Which of the following questions are unsuitable for A/B testing?

1. which page of our site causes longer dwelling time?
2. which feature should I launch next?
3. which proportional offer will yield more revenue?
4. which icon will yield more clicks?